Table 4.

Correlation analysis for each behavior and the most relevant environmental characteristic within a 1-km radius from a school for students in Thessaloniki (24 schools). “Food” and “Sports” are computed as the summation of all relevant environmental characteristics reflecting the availability of food places or sports-related facilities. “Visitors” indicate the aggregation of behaviors from unique children visiting a geohash, while “visits” indicate aggregation from all the visits to a geohash even when performed by the same children. For the areas close to schools, 281 geohashes with more than 5 unique visitors and 523 geohashes with more than 5 visits were analyzed.

Behavior and environment		Thessaloniki
		Correlation (CI)	P value
Steps/hour (visitors)
	Food	0.123 (0.006-0.237)	.04
	Sports	0.128 (0.011-0.241)	.03
Steps/hour (visits)
	Food	0.129 (0.043-0.212)	.003
	Sports	0.141 (0.056-0.224)	.001
% visits to
	Food places	0.221 (0.138-0.301)	<.001
	Fast food or takeaway places	0.302 (0.222-0.378)	<.001
	Supermarkets or grocery stores	0.209 (0.211-0.368)	<.001
	Athletics or sports facilities	0.325 (0.246-0.400)	<.001
	Indoor recreation facilities	0.305 (0.225-0.381)	<.001
	Public parks	0.248 (0.166-0.327)	<.001